Answers These problems

Problem $1$ a$.$ How much will be accumulated in a fund, earning a$5\%$ annual interest rate, if $$5,000$ is deposited at the end of each year for $5$ years?

Problem $1$ b$.$ At what growth rate $($annual interest rate$),$ would it take a sum to quadruple in $18$ years? Select the interest rate that is closest to the correct answer.

Problem $2.$ You wish to retire after $26$ years; and you want to have accumulated enough money to receive an annuity of$$72,000$ a year for $22$ years ofretirement.During the period before retirement, you can earn $4$ percent annually, while after retirement you can earn $5$ percent on your money. What annual contribution to the retirement fund will allow you to receive the$$72,000$ annually?Finding each figure for either numerator ordenominator; one point each and the result for $0\mathrm{.}5$ points